CN2308924Y

CN2308924Y - Alarm

Info

Publication number: CN2308924Y
Application number: CN 97235914
Authority: CN
Inventors: 朱其斌
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-04-28
Filing date: 1997-04-28
Publication date: 1999-02-24
Anticipated expiration: 2007-04-28

Abstract

The utility model relates to an alarm, comprising a power supply, a trigger locking circuit and an alarm circuit. The utility model is characterized in that the trigger locking circuit is formed by the connection of two relays; the contacts A of the two relays are connected with the E end of the power supply; the normally closed contact B of the relay K < 1 > is connected with the normally open contact C of the relay K < 2 > and one end of a coil; the other end of the coil of the relay K < 2 > is connected with the F end of the power supply; a reset switch SA < 3 > is arranged on the loop of the coil of the relay K < 2 >; the coil of the relay K < 1 > is connected with both ends of the power supply by the normally closed trigger switch SA < 2 >; the normally open contact C of the relay K < 2 > is the output end of the locking circuit, used for outputting signals to the alarm circuit.

Description

Alarm

The utility model relates to a kind of alarm that has lock function.

Existing alarm is of a great variety, its basic structure is made up of power supply, trigger circuit and warning circuit three parts, trigger circuit comprise that mostly touching switch and lock-in circuit constitutes, the action of trigger switch, make the lock-in circuit upset, output one weighing apparatus is decided signal, and this moment, trigger switch did not influence this output signal at which kind of state, have only by the reset switch in the lock-in circuit, just can make it be turned to armed state.This lock-in circuit generally is made of the electronic component or the integrated package that separate, and action is rapidly sensitive, but is prone to misoperation.

The purpose of this utility model is a kind of alarm that utilizes the relay locking of design.

Task of the present utility model is done in such a way that the alarm of being made up of power supply, triggering lock-in circuit and warning circuit, and it is characterized in that triggering lock-in circuit is to be formed by connecting by two relays, and the contact A of two relays connects the E end of power supply, relay K ₁Normally closed contact B and relay K ₂Normally opened contact C and an end of coil be connected relay K ₂The F end of another termination power of coil is in relay K ₂Wire loop is provided with reset switch S ₃, relay K ₁Coil is through normally closed trigger switch SA ₂Connect both ends of power, relay K ₂Normally opened contact C be the output terminal of lock-in circuit, output signal to warning circuit.Relay K ₁Play trigger action, when normally closed switch disconnects relay K ₁Coil losing electricity, its normally closed contact gets electric, makes relay K ₂Coil gets electric, normally closed contact conducting, and formation self-locking state, relay K at this moment ₁Any action that reaches normally closed switch does not influence this state, from relay K ₂Normally opened contact C end output one signal is given warning circuit, drives warning circuit work.

The utility model is simple in structure, and is reasonable in design, forms lock-in circuit by two relays, has high reliability, and the few characteristics of misoperation.

Below in conjunction with concrete legend the utility model is described further:

Accompanying drawing is the structural representation of the utility model

With reference to accompanying drawing, this example provides a kind of three the tunnel and triggers the alarm that lock-in circuit is formed, and the working power that triggers lock-in circuit can be AC power or direct supply, when adopting direct supply, E termination positive pole, F termination negative pole, the contact A of two relays connects the E end of power supply, relay K ₁Normally closed contact B and relay K ₂Normally opened contact C and an end of coil be connected relay K ₂The F end of another termination power of coil is in relay K ₂Wire loop is provided with reset switch SA ₃, relay K ₁Coil is through normally closed trigger switch SA ₂Connect both ends of power, relay K ₂Normally opened contact C be the output terminal of lock-in circuit, output signal to warning circuit.Reset switch SA ₃When start reporting to the police, disconnect earlier, then be in normally off, and close single channel also can be when triggering lock-in circuit with reset switch SA ₃Disconnect, remove when reporting to the police, connect reset switch SA after the disconnection again ₃Can reset, alarm is ready once more, relay K ₁Coil is through normally closed trigger switch SA ₂Connect both ends of power, normally closed trigger switch SA ₂Can be the switch of form such as magnetic control or the on-off circuit of forming by circuit such as sensors, as long as switch S A ₂Disconnect, promptly be in alarm condition, conducting is for awaiting orders, at normally closed trigger switch SA ₂Go up and be connected to a switch S A ₁, control voluntarily by the user, if switch S A ₁Closure, switch S A ₂Promptly ineffective, relay K on this basis ₂The switch S B of normally opened contact C end and power supply E termination one fine motion character, as long as triggering and conducting its, relay K ₂Also can produce lock first, be in alarm condition.Be connected to unidirectional conducting diode VD on the output terminal of lock-in circuit, this output terminal that can make multichannel trigger lock-in circuit is attempted by the input end of warning circuit, and a shared warning circuit becomes multichannel control alarm.In relay K ₂The coil two ends and be connected to light emitting diode VH, light emitting diode VH has promptly constituted the simplest optical alarm circuit, be and trigger lock-in circuit one to one, if need other action as acoustic alarm or drive other device action, the input end that connects warning circuit or driving circuit at triggering lock-in circuit output terminal gets final product.This example is triggering lock-in circuit output relay termination K ₃Coil, then the input end of level warning circuit is connected on the normally opened contact of relay K 3, by relay lock-in circuit and warning circuit is isolated, and makes two parts circuit can select optimal separately power supply power supply, the adaptation occasion of increase alarm for use.

Above-mentioned alleged microswitch SB and normally closed trigger switch SA ₂The also electronic switch that can form by electronic circuits such as sensors.

Claims

1, a kind of alarm of forming by power supply, triggering lock-in circuit and warning circuit, it is characterized in that triggering lock-in circuit is to be formed by connecting by two relays, the contact A of two relays connects the E end of power supply, relay K ₁Normally closed contact B and relay K ₂Normally opened contact C and an end of coil be connected relay K ₂The F end of another termination power of coil is in relay K ₂Wire loop is provided with reset switch SA ₃, relay K ₁Coil is through normally closed trigger switch SA ₂Connect both ends of power, relay K ₂Normally opened contact C be the output terminal of lock-in circuit, output signal to warning circuit.

2, alarm according to claim 1 is characterized in that triggering on the output terminal of lock-in circuit and is connected to unidirectional conducting diode VD.

3, alarm according to claim 1 is characterized in that relay K ₂The coil two ends and be connected to light emitting diode VH.

4,, it is characterized in that the output terminal of multichannel triggering lock-in circuit is attempted by the input end of warning circuit, a shared alarm according to claim 1,2 or 3 described alarms.

5, alarm according to claim 1 is characterized in that normally closed trigger switch SA ₂Go up and be connected to switch S A ₁

6,, it is characterized in that in the E of power supply end and relay K according to claim 1,2,3 or 5 described alarms ₂Normally opened contact C between and be connected to microswitch SB.